VirtualBox

source: vbox/trunk/src/VBox/Devices/PC/BIOS/keyboard.c@ 93115

Last change on this file since 93115 was 93115, checked in by vboxsync, 2 years ago

scm --update-copyright-year
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 27.4 KB
Line 
1/* $Id: keyboard.c 93115 2022-01-01 11:31:46Z vboxsync $ */
2/** @file
3 * PC BIOS - ???
4 */
5
6/*
7 * Copyright (C) 2006-2022 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 * --------------------------------------------------------------------
17 *
18 * This code is based on:
19 *
20 * ROM BIOS for use with Bochs/Plex86/QEMU emulation environment
21 *
22 * Copyright (C) 2002 MandrakeSoft S.A.
23 *
24 * MandrakeSoft S.A.
25 * 43, rue d'Aboukir
26 * 75002 Paris - France
27 * http://www.linux-mandrake.com/
28 * http://www.mandrakesoft.com/
29 *
30 * This library is free software; you can redistribute it and/or
31 * modify it under the terms of the GNU Lesser General Public
32 * License as published by the Free Software Foundation; either
33 * version 2 of the License, or (at your option) any later version.
34 *
35 * This library is distributed in the hope that it will be useful,
36 * but WITHOUT ANY WARRANTY; without even the implied warranty of
37 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
38 * Lesser General Public License for more details.
39 *
40 * You should have received a copy of the GNU Lesser General Public
41 * License along with this library; if not, write to the Free Software
42 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
43 *
44 */
45
46/*
47 * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
48 * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
49 * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
50 * a choice of LGPL license versions is made available with the language indicating
51 * that LGPLv2 or any later version may be used, or where a choice of which version
52 * of the LGPL is applied is otherwise unspecified.
53 */
54
55
56#include <stdint.h>
57#include "inlines.h"
58#include "biosint.h"
59
60#if DEBUG_INT16
61# define BX_DEBUG_INT16(...) BX_DEBUG(__VA_ARGS__)
62#else
63# define BX_DEBUG_INT16(...)
64#endif
65
66extern void post(void);
67#pragma aux post "*";
68
69void jmp_post(void);
70#pragma aux jmp_post = "jmp far ptr post" aborts;
71
72extern void eoi_master_pic(void); /* in assembly code */
73#pragma aux eoi_master_pic "*";
74
75/* Manually save/restore BP around invoking user Ctrl-Break handler.
76 * The handler could conceivably clobber BP and the compiler does not
77 * believe us when we say 'modify [bp]' (BP is considered unalterable).
78 */
79void int_1b(void);
80#pragma aux int_1b = \
81 "push bp" \
82 "int 1Bh" \
83 "pop bp" \
84 value [bp] modify [bp];
85
86
87#define none 0
88#define MAX_SCAN_CODE 0x58
89
90struct {
91 uint16_t normal;
92 uint16_t shift;
93 uint16_t control;
94 uint16_t alt;
95 uint8_t lock_flags;
96} static const scan_to_scanascii[MAX_SCAN_CODE + 1] = {
97 { none, none, none, none, none },
98 { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
99 { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
100 { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
101 { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
102 { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
103 { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
104 { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
105 { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
106 { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
107 { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
108 { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
109 { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
110 { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
111 { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
112 { 0x0f09, 0x0f00, none, none, none }, /* tab */
113 { 0x1071, 0x1051, 0x1011, 0x1000, 0x40 }, /* Q */
114 { 0x1177, 0x1157, 0x1117, 0x1100, 0x40 }, /* W */
115 { 0x1265, 0x1245, 0x1205, 0x1200, 0x40 }, /* E */
116 { 0x1372, 0x1352, 0x1312, 0x1300, 0x40 }, /* R */
117 { 0x1474, 0x1454, 0x1414, 0x1400, 0x40 }, /* T */
118 { 0x1579, 0x1559, 0x1519, 0x1500, 0x40 }, /* Y */
119 { 0x1675, 0x1655, 0x1615, 0x1600, 0x40 }, /* U */
120 { 0x1769, 0x1749, 0x1709, 0x1700, 0x40 }, /* I */
121 { 0x186f, 0x184f, 0x180f, 0x1800, 0x40 }, /* O */
122 { 0x1970, 0x1950, 0x1910, 0x1900, 0x40 }, /* P */
123 { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
124 { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
125 { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
126 { none, none, none, none, none }, /* L Ctrl */
127 { 0x1e61, 0x1e41, 0x1e01, 0x1e00, 0x40 }, /* A */
128 { 0x1f73, 0x1f53, 0x1f13, 0x1f00, 0x40 }, /* S */
129 { 0x2064, 0x2044, 0x2004, 0x2000, 0x40 }, /* D */
130 { 0x2166, 0x2146, 0x2106, 0x2100, 0x40 }, /* F */
131 { 0x2267, 0x2247, 0x2207, 0x2200, 0x40 }, /* G */
132 { 0x2368, 0x2348, 0x2308, 0x2300, 0x40 }, /* H */
133 { 0x246a, 0x244a, 0x240a, 0x2400, 0x40 }, /* J */
134 { 0x256b, 0x254b, 0x250b, 0x2500, 0x40 }, /* K */
135 { 0x266c, 0x264c, 0x260c, 0x2600, 0x40 }, /* L */
136 { 0x273b, 0x273a, none, none, none }, /* ;: */
137 { 0x2827, 0x2822, none, none, none }, /* '" */
138 { 0x2960, 0x297e, none, none, none }, /* `~ */
139 { none, none, none, none, none }, /* L shift */
140 { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
141 { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, 0x40 }, /* Z */
142 { 0x2d78, 0x2d58, 0x2d18, 0x2d00, 0x40 }, /* X */
143 { 0x2e63, 0x2e43, 0x2e03, 0x2e00, 0x40 }, /* C */
144 { 0x2f76, 0x2f56, 0x2f16, 0x2f00, 0x40 }, /* V */
145 { 0x3062, 0x3042, 0x3002, 0x3000, 0x40 }, /* B */
146 { 0x316e, 0x314e, 0x310e, 0x3100, 0x40 }, /* N */
147 { 0x326d, 0x324d, 0x320d, 0x3200, 0x40 }, /* M */
148 { 0x332c, 0x333c, none, none, none }, /* ,< */
149 { 0x342e, 0x343e, none, none, none }, /* .> */
150 { 0x352f, 0x353f, none, none, none }, /* /? */
151 { none, none, none, none, none }, /* R Shift */
152 { 0x372a, 0x372a, none, none, none }, /* * */
153 { none, none, none, none, none }, /* L Alt */
154 { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
155 { none, none, none, none, none }, /* caps lock */
156 { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
157 { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
158 { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
159 { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
160 { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
161 { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
162 { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
163 { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
164 { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
165 { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
166 { none, none, none, none, none }, /* Num Lock */
167 { none, none, none, none, none }, /* Scroll Lock */
168 { 0x4700, 0x4737, 0x7700, none, 0x20 }, /* 7 Home */
169 { 0x4800, 0x4838, none, none, 0x20 }, /* 8 UP */
170 { 0x4900, 0x4939, 0x8400, none, 0x20 }, /* 9 PgUp */
171 { 0x4a2d, 0x4a2d, none, none, none }, /* - */
172 { 0x4b00, 0x4b34, 0x7300, none, 0x20 }, /* 4 Left */
173 { 0x4c00, 0x4c35, none, none, 0x20 }, /* 5 */
174 { 0x4d00, 0x4d36, 0x7400, none, 0x20 }, /* 6 Right */
175 { 0x4e2b, 0x4e2b, none, none, none }, /* + */
176 { 0x4f00, 0x4f31, 0x7500, none, 0x20 }, /* 1 End */
177 { 0x5000, 0x5032, none, none, 0x20 }, /* 2 Down */
178 { 0x5100, 0x5133, 0x7600, none, 0x20 }, /* 3 PgDn */
179 { 0x5200, 0x5230, none, none, 0x20 }, /* 0 Ins */
180 { 0x5300, 0x532e, none, none, 0x20 }, /* Del */
181 { none, none, none, none, none },
182 { none, none, none, none, none },
183 { 0x565c, 0x567c, none, none, none }, /* \| */
184 { 0x8500, 0x8700, 0x8900, 0x8b00, none }, /* F11 */
185 { 0x8600, 0x8800, 0x8a00, 0x8c00, none } /* F12 */
186};
187
188
189/* Keyboard initialization. */
190
191//--------------------------------------------------------------------------
192// keyboard_panic
193//--------------------------------------------------------------------------
194void keyboard_panic(uint16_t status)
195{
196 // If you're getting a 993 keyboard panic here,
197 // please see the comment in keyboard_init
198
199 BX_PANIC("Keyboard error:%u\n",status);
200}
201
202
203//--------------------------------------------------------------------------
204// keyboard_init
205//--------------------------------------------------------------------------
206// this file is based on LinuxBIOS implementation of keyboard.c
207// could convert to #asm to gain space
208void BIOSCALL keyboard_init(void)
209{
210 uint16_t max;
211
212 /* ------------------- controller side ----------------------*/
213 /* send cmd = 0xAA, self test 8042 */
214 outb(0x64, 0xaa);
215
216 /* Wait until buffer is empty */
217 max=0xffff;
218 while ( (inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x00);
219 if (max==0x0) keyboard_panic(00);
220
221 /* Wait for data */
222 max=0xffff;
223 while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x01);
224 if (max==0x0) keyboard_panic(01);
225
226 /* read self-test result, 0x55 should be returned from 0x60 */
227 if ((inb(0x60) != 0x55)){
228 keyboard_panic(991);
229 }
230
231 /* send cmd = 0xAB, keyboard interface test */
232 outb(0x64,0xab);
233
234 /* Wait until buffer is empty */
235 max=0xffff;
236 while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x10);
237 if (max==0x0) keyboard_panic(10);
238
239 /* Wait for data */
240 max=0xffff;
241 while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x11);
242 if (max==0x0) keyboard_panic(11);
243
244 /* read keyboard interface test result, */
245 /* 0x00 should be returned form 0x60 */
246 if ((inb(0x60) != 0x00)) {
247 keyboard_panic(992);
248 }
249
250 /* ------------------- keyboard side ------------------------*/
251 /* reset keyboard and self test (keyboard side) */
252 /* also enables the keyboard interface */
253 outb(0x60, 0xff);
254
255 /* Wait until buffer is empty */
256 max=0xffff;
257 while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x20);
258 if (max==0x0) keyboard_panic(20);
259
260 /* Wait for data */
261 max=0xffff;
262 while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x21);
263 if (max==0x0) keyboard_panic(21);
264
265 /* keyboard should return ACK */
266 if ((inb(0x60) != 0xfa)) {
267 keyboard_panic(993);
268 }
269
270 /* Wait for reset to complete */
271 while ( (inb(0x64) & 0x01) == 0 ) outb(0x80, 0x31);
272
273 if ((inb(0x60) != 0xaa && inb(0x60) != 0xaa)) {
274 keyboard_panic(994);
275 }
276
277 /* Disable keyboard */
278 outb(0x60, 0xf5);
279
280 /* Wait until buffer is empty */
281 max=0xffff;
282 while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x40);
283 if (max==0x0) keyboard_panic(40);
284
285 /* Wait for data */
286 max=0xffff;
287 while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x41);
288 if (max==0x0) keyboard_panic(41);
289
290 /* keyboard should return ACK */
291 if ((inb(0x60) != 0xfa)) {
292 keyboard_panic(995);
293 }
294
295 /* Write Keyboard Mode */
296 outb(0x64, 0x60);
297
298 /* Wait until buffer is empty */
299 max=0xffff;
300 while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x50);
301 if (max==0x0) keyboard_panic(50);
302
303 /* send cmd: scan code convert, disable mouse, enable IRQ 1 */
304 outb(0x60, 0x65);
305
306 /* Wait until buffer is empty */
307 max=0xffff;
308 while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x60);
309 if (max==0x0) keyboard_panic(60);
310
311 /* Enable keyboard */
312 outb(0x60, 0xf4);
313
314 /* Wait until buffer is empty */
315 max=0xffff;
316 while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x70);
317 if (max==0x0) keyboard_panic(70);
318
319 /* Wait for data */
320 max=0xffff;
321 while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x71);
322 if (max==0x0) keyboard_panic(70);
323
324 /* keyboard should return ACK */
325 if ((inb(0x60) != 0xfa)) {
326 keyboard_panic(996);
327 }
328
329 /* Enable aux interface */
330 outb(0x64,0xa8);
331
332 /* While we're here, disable the A20 gate. Required for
333 * compatibility with the IBM PC and DOS.
334 */
335 set_enable_a20(0);
336}
337
338
339unsigned int enqueue_key(uint8_t scan_code, uint8_t ascii_code)
340{
341 uint16_t buffer_start, buffer_end, buffer_head, buffer_tail, temp_tail;
342
343#if VBOX_BIOS_CPU >= 80286
344 buffer_start = read_word(0x0040, 0x0080);
345 buffer_end = read_word(0x0040, 0x0082);
346#else
347 buffer_start = 0x001E;
348 buffer_end = 0x003E;
349#endif
350
351 buffer_head = read_word(0x0040, 0x001A);
352 buffer_tail = read_word(0x0040, 0x001C);
353
354 temp_tail = buffer_tail;
355 buffer_tail += 2;
356 if (buffer_tail >= buffer_end)
357 buffer_tail = buffer_start;
358
359 if (buffer_tail == buffer_head)
360 return(0);
361
362 write_byte(0x0040, temp_tail, ascii_code);
363 write_byte(0x0040, temp_tail+1, scan_code);
364 write_word(0x0040, 0x001C, buffer_tail);
365 return(1);
366}
367
368
369/* Keyboard hardware interrupt handler. */
370/// @todo should this be declared as taking arguments at all?
371void BIOSCALL int09_function(uint16_t ES, uint16_t DI, uint16_t SI, uint16_t BP, uint16_t SP,
372 uint16_t BX, uint16_t DX, uint16_t CX, uint16_t AX)
373{
374 uint8_t scancode, asciicode, shift_flags;
375 uint8_t mf2_flags, mf2_state, flag;
376
377 //
378 // DS has been set to F000 before call
379 //
380
381
382 scancode = GET_AL();
383
384 if (scancode == 0) {
385 BX_INFO("KBD: int09 handler: AL=0\n");
386 return;
387 }
388
389 mf2_flags = read_byte(0x0040, 0x18);
390 mf2_state = read_byte(0x0040, 0x96);
391 shift_flags = read_byte(0x0040, 0x17);
392 asciicode = 0;
393
394 switch (scancode) {
395 case 0x3a: /* Caps Lock press */
396 shift_flags ^= 0x40;
397 write_byte(0x0040, 0x17, shift_flags);
398 mf2_flags |= 0x40;
399 write_byte(0x0040, 0x18, mf2_flags);
400 break;
401 case 0xba: /* Caps Lock release */
402 mf2_flags &= ~0x40;
403 write_byte(0x0040, 0x18, mf2_flags);
404 break;
405
406 case 0x2a: /* L Shift press */
407 case 0xaa: /* L Shift release */
408 case 0x36: /* R Shift press */
409 case 0xb6: /* R Shift release */
410 /* If this was an extended (i.e. faked) key, leave flags alone. */
411 if (!(mf2_state & 0x02)) {
412 flag = (scancode & 0x7f) == 0x2a ? 0x02 : 0x01;
413 if (scancode & 0x80)
414 shift_flags &= ~flag;
415 else
416 shift_flags |= flag;
417 write_byte(0x0040, 0x17, shift_flags);
418 }
419 break;
420
421 case 0x1d: /* Ctrl press */
422 if ((mf2_state & 0x01) == 0) {
423 shift_flags |= 0x04;
424 write_byte(0x0040, 0x17, shift_flags);
425 if (mf2_state & 0x02) {
426 mf2_state |= 0x04;
427 write_byte(0x0040, 0x96, mf2_state);
428 } else {
429 mf2_flags |= 0x01;
430 write_byte(0x0040, 0x18, mf2_flags);
431 }
432 }
433 break;
434 case 0x9d: /* Ctrl release */
435 if ((mf2_state & 0x01) == 0) {
436 shift_flags &= ~0x04;
437 write_byte(0x0040, 0x17, shift_flags);
438 if (mf2_state & 0x02) {
439 mf2_state &= ~0x04;
440 write_byte(0x0040, 0x96, mf2_state);
441 } else {
442 mf2_flags &= ~0x01;
443 write_byte(0x0040, 0x18, mf2_flags);
444 }
445 }
446 break;
447
448 case 0x38: /* Alt press */
449 shift_flags |= 0x08;
450 write_byte(0x0040, 0x17, shift_flags);
451 if (mf2_state & 0x02) {
452 mf2_state |= 0x08;
453 write_byte(0x0040, 0x96, mf2_state);
454 } else {
455 mf2_flags |= 0x02;
456 write_byte(0x0040, 0x18, mf2_flags);
457 }
458 break;
459 case 0xb8: /* Alt release */
460 shift_flags &= ~0x08;
461 write_byte(0x0040, 0x17, shift_flags);
462 if (mf2_state & 0x02) {
463 mf2_state &= ~0x08;
464 write_byte(0x0040, 0x96, mf2_state);
465 } else {
466 mf2_flags &= ~0x02;
467 write_byte(0x0040, 0x18, mf2_flags);
468 }
469 break;
470
471 case 0x45: /* Num Lock/Pause press */
472 if ((mf2_state & 0x03) == 0) {
473 /* Num Lock */
474 mf2_flags |= 0x20;
475 write_byte(0x0040, 0x18, mf2_flags);
476 shift_flags ^= 0x20;
477 write_byte(0x0040, 0x17, shift_flags);
478 } else {
479 /* Pause */
480 mf2_flags |= 0x08; /* Set the suspend flag */
481 write_byte(0x0040, 0x18, mf2_flags);
482
483 /* Enable keyboard and send EOI. */
484 outp(0x64, 0xae);
485 eoi_master_pic();
486
487 while (read_byte(0x0040, 0x18) & 0x08)
488 ; /* Hold on and wait... */
489
490 /// @todo We will send EOI again (and enable keyboard) on the way out; we shouldn't
491 }
492 break;
493 case 0xc5: /* Num Lock/Pause release */
494 if ((mf2_state & 0x03) == 0) {
495 mf2_flags &= ~0x20;
496 write_byte(0x0040, 0x18, mf2_flags);
497 }
498 break;
499
500 case 0x46: /* Scroll Lock/Break press */
501 if (mf2_state & 0x02) { /* E0 prefix? */
502 /* Zap the keyboard buffer. */
503 write_word(0x0040, 0x001c, read_word(0x0040, 0x001a));
504
505 write_byte(0x0040, 0x71, 0x80); /* Set break flag */
506 outp(0x64, 0xae); /* Enable keyboard */
507 int_1b(); /* Invoke user handler */
508 enqueue_key(0, 0); /* Dummy key press*/
509 } else {
510 mf2_flags |= 0x10;
511 write_byte(0x0040, 0x18, mf2_flags);
512 shift_flags ^= 0x10;
513 write_byte(0x0040, 0x17, shift_flags);
514 }
515 break;
516
517 case 0xc6: /* Scroll Lock/Break release */
518 if (!(mf2_state & 0x02)) { /* Only if no E0 prefix */
519 mf2_flags &= ~0x10;
520 write_byte(0x0040, 0x18, mf2_flags);
521 }
522 break;
523
524 case 0x54: /* SysRq press */
525 if (!(mf2_flags & 0x04)) { /* If not already down */
526 mf2_flags |= 0x04;
527 write_byte(0x0040, 0x18, mf2_flags);
528 /// @todo EOI/enable kbd/enable interrupts/call INT 15h/8500h
529 }
530 break;
531
532 case 0xd4: /* SysRq release */
533 mf2_flags &= ~0x04;
534 write_byte(0x0040, 0x18, mf2_flags);
535 /// @todo EOI/enable kbd/enable interrupts/call INT 15h/8501h
536 break;
537
538 case 0x53: /* Del press */
539 if ((shift_flags & 0x0c) == 0x0c) {
540 /* Indicate a warm boot. */
541 write_word(0x0040,0x0072, 0x1234);
542 jmp_post();
543 }
544 /* fall through */
545
546 default:
547 /* Check if suspend flag set. */
548 if (mf2_flags & 0x08) {
549 /* Pause had been pressed. Clear suspend flag and do nothing. */
550 mf2_flags &= ~0x08;
551 write_byte(0x0040, 0x18, mf2_flags);
552 return;
553 }
554
555 if (scancode & 0x80) {
556 /* Set ack/resend flags if appropriate. */
557 if (scancode == 0xFA) {
558 flag = read_byte(0x0040, 0x97) | 0x10;
559 write_byte(0x0040, 0x97, flag);
560 } else if (scancode == 0xFE) {
561 flag = read_byte(0x0040, 0x97) | 0x20;
562 write_byte(0x0040, 0x97, flag);
563 }
564 break; /* toss key releases ... */
565 }
566 if (scancode > MAX_SCAN_CODE) {
567 BX_INFO("KBD: int09h_handler(): unknown scancode read: 0x%02x!\n", scancode);
568 return;
569 }
570 if (shift_flags & 0x08) { /* ALT */
571 asciicode = scan_to_scanascii[scancode].alt;
572 scancode = scan_to_scanascii[scancode].alt >> 8;
573 } else if (shift_flags & 0x04) { /* CONTROL */
574 asciicode = scan_to_scanascii[scancode].control;
575 scancode = scan_to_scanascii[scancode].control >> 8;
576 } else if (((mf2_state & 0x02) > 0) && ((scancode >= 0x47) && (scancode <= 0x53))) {
577 /* extended keys handling */
578 asciicode = 0xe0;
579 scancode = scan_to_scanascii[scancode].normal >> 8;
580 } else if (shift_flags & 0x03) { /* LSHIFT + RSHIFT */
581 /* check if lock state should be ignored
582 * because a SHIFT key are pressed */
583
584 if (shift_flags & scan_to_scanascii[scancode].lock_flags) {
585 asciicode = scan_to_scanascii[scancode].normal;
586 scancode = scan_to_scanascii[scancode].normal >> 8;
587 } else {
588 asciicode = scan_to_scanascii[scancode].shift;
589 scancode = scan_to_scanascii[scancode].shift >> 8;
590 }
591 } else {
592 /* check if lock is on */
593 if (shift_flags & scan_to_scanascii[scancode].lock_flags) {
594 asciicode = scan_to_scanascii[scancode].shift;
595 scancode = scan_to_scanascii[scancode].shift >> 8;
596 } else {
597 asciicode = scan_to_scanascii[scancode].normal;
598 scancode = scan_to_scanascii[scancode].normal >> 8;
599 }
600 }
601 if (scancode==0 && asciicode==0) {
602 BX_INFO("KBD: int09h_handler(): scancode & asciicode are zero?\n");
603 }
604 enqueue_key(scancode, asciicode);
605 break;
606 }
607 if ((scancode & 0x7f) != 0x1d) {
608 mf2_state &= ~0x01;
609 }
610 mf2_state &= ~0x02;
611 write_byte(0x0040, 0x96, mf2_state);
612}
613
614unsigned int dequeue_key(uint8_t __far *scan_code, uint8_t __far *ascii_code, unsigned incr)
615{
616 uint16_t buffer_start, buffer_end, buffer_head, buffer_tail;
617 uint8_t acode, scode;
618
619#if VBOX_BIOS_CPU >= 80286
620 buffer_start = read_word(0x0040, 0x0080);
621 buffer_end = read_word(0x0040, 0x0082);
622#else
623 buffer_start = 0x001E;
624 buffer_end = 0x003E;
625#endif
626
627 buffer_head = read_word(0x0040, 0x001a);
628 buffer_tail = read_word(0x0040, 0x001c);
629
630 if (buffer_head != buffer_tail) {
631 acode = read_byte(0x0040, buffer_head);
632 scode = read_byte(0x0040, buffer_head+1);
633 *ascii_code = acode;
634 *scan_code = scode;
635 BX_DEBUG_INT16("dequeue_key: ascii=%02x scan=%02x \n", acode, scode);
636
637 if (incr) {
638 buffer_head += 2;
639 if (buffer_head >= buffer_end)
640 buffer_head = buffer_start;
641 write_word(0x0040, 0x001a, buffer_head);
642 }
643 return(1);
644 }
645 else {
646 return(0);
647 }
648}
649
650
651/// @todo move somewhere else?
652#define AX r.gr.u.r16.ax
653#define BX r.gr.u.r16.bx
654#define CX r.gr.u.r16.cx
655#define DX r.gr.u.r16.dx
656#define SI r.gr.u.r16.si
657#define DI r.gr.u.r16.di
658#define BP r.gr.u.r16.bp
659#define SP r.gr.u.r16.sp
660#define FLAGS r.ra.flags.u.r16.flags
661#define IFLGS r.ifl
662
663/* Interrupt 16h service implementation. */
664
665void BIOSCALL int16_function(volatile kbd_regs_t r)
666{
667 uint8_t scan_code, ascii_code, shift_flags, led_flags, count;
668 uint16_t kbd_code, max;
669
670 BX_DEBUG_INT16("int16: AX=%04x BX=%04x CX=%04x DX=%04x \n", AX, BX, CX, DX);
671
672 shift_flags = read_byte(0x0040, 0x17);
673 led_flags = read_byte(0x0040, 0x97);
674 if ((((shift_flags >> 4) & 0x07) ^ (led_flags & 0x07)) != 0) {
675 int_disable(); /// @todo interrupts should be disabled already??
676 outb(0x60, 0xed);
677 while ((inb(0x64) & 0x01) == 0) outb(0x80, 0x21);
678 if ((inb(0x60) == 0xfa)) {
679 led_flags &= 0xc8;
680 led_flags |= ((shift_flags >> 4) & 0x07);
681 outb(0x60, led_flags & 0x07);
682 while ((inb(0x64) & 0x01) == 0)
683 outb(0x80, 0x21);
684 inb(0x60);
685 write_byte(0x0040, 0x97, led_flags);
686 }
687 int_enable();
688 }
689
690 switch (GET_AH()) {
691 case 0x00: /* read keyboard input */
692 if ( !dequeue_key(&scan_code, &ascii_code, 1) ) {
693 BX_PANIC("KBD: int16h: out of keyboard input\n");
694 }
695 if (scan_code !=0 && ascii_code == 0xF0)
696 ascii_code = 0;
697 else if (ascii_code == 0xE0)
698 ascii_code = 0;
699 AX = (scan_code << 8) | ascii_code;
700 break;
701
702 case 0x01: /* check keyboard status */
703 /* Enable interrupts, preserve most flags. Some callers depend on that! */
704 FLAGS = IFLGS;
705 if ( !dequeue_key(&scan_code, &ascii_code, 0) ) {
706 SET_ZF();
707 return;
708 }
709 if (scan_code !=0 && ascii_code == 0xF0)
710 ascii_code = 0;
711 else if (ascii_code == 0xE0)
712 ascii_code = 0;
713 AX = (scan_code << 8) | ascii_code;
714 CLEAR_ZF();
715 break;
716
717 case 0x02: /* get shift flag status */
718 shift_flags = read_byte(0x0040, 0x17);
719 SET_AL(shift_flags);
720 break;
721
722 case 0x05: /* store key-stroke into buffer */
723 if ( !enqueue_key(GET_CH(), GET_CL()) ) {
724 SET_AL(1);
725 }
726 else {
727 SET_AL(0);
728 }
729 break;
730
731 case 0x09: /* GET KEYBOARD FUNCTIONALITY */
732 // bit Bochs Description
733 // 7 0 reserved
734 // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
735 // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
736 // 4 1 INT 16/AH=0Ah supported
737 // 3 0 INT 16/AX=0306h supported
738 // 2 0 INT 16/AX=0305h supported
739 // 1 0 INT 16/AX=0304h supported
740 // 0 0 INT 16/AX=0300h supported
741 //
742 SET_AL(0x30);
743 break;
744
745 case 0x0A: /* GET KEYBOARD ID */
746 count = 2;
747 kbd_code = 0x0;
748 /// @todo Might be better to just mask the KB interrupt
749 int_disable();
750 outb(0x60, 0xf2);
751 /* Wait for data */
752 max=0xffff;
753 while ( ((inb(0x64) & 0x01) == 0) && (--max>0) )
754 inb(0x80);
755 if (max>0x0) {
756 if ((inb(0x60) == 0xfa)) {
757 do {
758 max=0xffff;
759 while ( ((inb(0x64) & 0x01) == 0) && (--max>0) )
760 inb(0x80);
761 if (max>0x0) {
762 kbd_code >>= 8;
763 kbd_code |= (inb(0x60) << 8);
764 }
765 } while (--count>0);
766 }
767 }
768 BX=kbd_code;
769 break;
770
771 case 0x10: /* read MF-II keyboard input */
772 if ( !dequeue_key(&scan_code, &ascii_code, 1) ) {
773 BX_PANIC("KBD: int16h: out of keyboard input\n");
774 }
775 if (scan_code !=0 && ascii_code == 0xF0)
776 ascii_code = 0;
777 AX = (scan_code << 8) | ascii_code;
778 break;
779
780 case 0x11: /* check MF-II keyboard status */
781 /* Enable interrupts, preserve most flags. Some callers depend on that! */
782 FLAGS = IFLGS;
783 if ( !dequeue_key(&scan_code, &ascii_code, 0) ) {
784 SET_ZF();
785 return;
786 }
787 if (scan_code !=0 && ascii_code == 0xF0)
788 ascii_code = 0;
789 AX = (scan_code << 8) | ascii_code;
790 CLEAR_ZF();
791 break;
792
793 case 0x12: /* get extended keyboard status */
794 shift_flags = read_byte(0x0040, 0x17);
795 SET_AL(shift_flags);
796 shift_flags = read_byte(0x0040, 0x18) & 0x73;
797 shift_flags |= read_byte(0x0040, 0x96) & 0x0c;
798 SET_AH(shift_flags);
799 BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
800 break;
801
802 case 0x92: /* keyboard capability check called by DOS 5.0+ keyb */
803 SET_AH(0x80); // function int16 ah=0x10-0x12 supported
804 break;
805
806 case 0xA2: /* 122 keys capability check called by DOS 5.0+ keyb */
807 // don't change AH : function int16 ah=0x20-0x22 NOT supported
808 break;
809
810 /// @todo what's the point of handling this??
811#if 0
812 case 0x6F:
813 if (GET_AL() == 0x08)
814 SET_AH(0x02); // unsupported, aka normal keyboard
815#endif
816
817 default:
818 BX_INFO("KBD: unsupported int 16h function %02x\n", GET_AH());
819 BX_INFO("AX=%04x BX=%04x CX=%04x DX=%04x \n", AX, BX, CX, DX);
820 }
821 BX_DEBUG_INT16("int16ex: AX=%04x BX=%04x CX=%04x DX=%04x \n", AX, BX, CX, DX);
822}
Note: See TracBrowser for help on using the repository browser.

© 2023 Oracle
Contact – Privacy policy – Terms of Use